研究目的:桥梁健康监测技术不断发展,但基于健康监测的结构损伤识别、性能评定等尚存困难.针对大胜关长江大桥基于健康监测的性能评定问题,本文主要研究实用的基于健康监测数据的桥梁运营性能评定方法及其指标体系.研究结论:(1)基于大胜关长江大桥静动力特点,提出基于健康监测数据的直接评定、变化量评定以及综合评定方法;(2)应用加速度监测数据结果开展直接评定及变化量评定,实测最大时段峰值加速度-121.54 mm/s2均小于计算值、正常值及安全限值,两时段实测加速度极值变化量与方差的比值最大为0.628,表明桥梁振动并不显著且振动变化也小,并得到“优良”、“无损伤”的综合评判结论;(3)验证了评定指标体系的适用性以及大胜关长江大桥良好的运营安全性,可为类似桥梁性能评定提供参考.%Research purposes:The bridge structural health monitoring technology continues to develop,however,it still has difficulty in damage identification and performance evaluation based on the healthy monitoring data.According to the problem of performance evaluation of Dashenggnan Yangtze River Bridge based on the healthy monitoring system,the service performance evaluation method and its detailed indexing system of the bridge based on healthy monitoring data were analyzed.Research conclusions:(1) Based on the results of detailed static,natural vibration and transient dynamic responses,the evaluation methods includes direct evaluation of measured parameters,the variation evaluation of the parameters,and comprehensive evaluation were put forward.(2) The healthy monitoring data were used to direct evaluation and variation evaluation,the results show that the maximum acceleration value-121.54 mm/s2 were smaller than the calculation,normal and safety limited value;the maximum ratio of variation value and variance is 0.628,so the vibration and the variation of vibration of the bridge are both fairly low and the comprehensive evaluation conclusion "excellent","no damage" were received.(3) The suitability of evaluation indexing system as well as the fairly well vibration characteristics of Dashenggnan Yangtze River Bridge were verified,and the method can provide certain references to other similar bridges.
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